In a medium saucepan, whisk together the vinegar and cornstarch until fully dissolved. Add in the honey, mustard, onion powder, cayenne pepper, and brown sugar.
Whisk to combine and simmer over medium heat while whisking until the glaze has reduced a bit, about 5 minutes. Separate the glaze into two small bowls. Reserving one half for dipping and keeping one half for basting the pork chops while grilling.
Season the pork chops on both sides with salt and pepper. Lightly grease the grates of an outdoor grill. Heat the grill to medium-high heat.
Add the pork chops and grill for about 3-4 minutes per side or until fully cooked (the internal temperature has reached 145 degrees F.).
Brush the pork chops with the half of the glaze used for basting while they are grilling.
Serve with the reserved half of the glaze that was not used for basting.